Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 1520

July 5, 200410 counties in Colorado; 4 counties in Kansas; 24 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2004, 11:40 AM MDT for 10 counties in Colorado; 4 counties in Kansas; 24 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 5, 2004, 11:40 AM MDT (17:40 UTC)
Expired
Jul 5, 2004, 1:45 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
All 38 counties

Adams County, CO, Arapahoe County, CO, Denver County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Arthur County, NE, Blaine County, NE, Box Butte County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Kimball County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Red Willow County, NE, Sheridan County, NE, Thomas County, NE

The radar

The Cheyenne radar (KCYS), 157 km from the middle of the area, began a volume at 17:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 5.7 hours before the alert went out and 114 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2004-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2004-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
6 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
2466 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 5, 1:20 PM MDTSevere Thunderstorm WatchSPCCheyenne, Kit Carson, Logan, Phillips, Sedgwick, Yuma6 hr
Jul 5, 3:36 PM MDTMesoscale DiscussionSPCBaca, Kiowa, Prowers54 min
Jul 5, 4:45 PM MDTSevere Thunderstorm WatchSPCKiowa, Prowers6 hr
Jul 5, 4:52 PM MDTMesoscale DiscussionSPCCheyenne, Kit Carson, Logan, Phillips, Sedgwick, Washington and 1 more83 min
Jul 4, 6:02 PM MDTMesoscale DiscussionSPCNorton, Phillips58 min
Jul 4, 6:12 PM MDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Ellis and 15 more2 hr
Jul 4, 6:25 PM MDTSevere Thunderstorm WatchSPCCloud, Graham, Jewell, Mitchell, Norton, Osborne and 5 more7 hr
Jul 4, 8:21 PM MDTMesoscale DiscussionSPCButler, Chase, Cowley, Dickinson, Elk, Ellsworth and 11 more54 min
Jul 4, 8:40 PM MDTSevere Thunderstorm WatchSPCAllen, Anderson, Barber, Barton, Butler, Chase and 44 more6 hr
Jul 4, 9:45 PM MDTMesoscale DiscussionSPCCloud, Jewell, Mitchell, Phillips, Republic, Smith60 min
Jul 4, 10:05 PM MDTSevere Thunderstorm WatchSPCBrown, Clay, Jackson, Marshall, Nemaha, Pottawatomie and 3 more5 hr
Jul 4, 10:20 PM MDTMesoscale DiscussionSPCBarber, Barton, Butler, Chase, Clark, Comanche and 30 more55 min
Jul 5, 12:16 AM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Jackson, Marshall, Nemaha89 min
Jul 5, 1:00 AM MDTSevere Thunderstorm WatchSPCAtchison, Brown, Doniphan, Douglas, Jackson, Jefferson and 5 more5 hr
Jul 5, 1:06 AM MDTMesoscale DiscussionSPCAllen, Anderson, Barber, Butler, Chase, Chautauqua and 20 more114 min
Jul 5, 2:25 AM MDTSevere Thunderstorm WatchSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more6 hr
Jul 5, 3:45 AM MDTMesoscale DiscussionSPCJohnson, Miami, Wyandotte2 hr
Jul 5, 5:02 AM MDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Labette, Montgomery, Neosho88 min
Jul 5, 2:43 PM MDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Cherokee, Crawford, Labette and 5 more92 min
Jul 5, 3:21 PM MDTMesoscale DiscussionSPCAllen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 20 more114 min
Jul 5, 3:40 PM MDTSevere Thunderstorm WatchSPCAllen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 17 more5 hr

Nearby

Mesoscale Discussions in Nebraska, 2004Mesoscale Discussions in Colorado, 2004Mesoscale Discussions in Kansas, 2004Every mesoscale discussion in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.